Iphutha elivamile 17: Lezi zimpawu zebhasi zonke zidonswa ngabaphikisi, ngakho-ke ngizizwa ngikhululekile.

Isixazululo esihle: Ziningi izizathu zokuthi kungani amasignali kudingeka adonswe phansi naphezulu, kodwa akuwona wonke adinga ukudonswa.I-resistor yokudonsa nokudonsa phansi idonsa isignali yokufaka elula, futhi yamanje ingaphansi kwamashumi ama-microamperes, kodwa uma isignali eshayelwayo idonswa, yamanje izofinyelela izinga le-milliamp.Isistimu yamanje ivamise ukuba namabhithi angu-32 edatha yekheli ngayinye, futhi kungase kube Uma ibhasi elingalodwa elingu-244/245 kanye nezinye izimpawu zidonswa, ama-watts ambalwa okusetshenziswa kwamandla azosetshenziswa kulezi zixhasi (ungasebenzisi umqondo wokuthi 80 amasenti nge-kilowatt-ihora ukwelapha lawa mawathi ambalwa okusetshenziswa kwamandla, isizathu siphansi Bheka).

Iphutha elivamile 18: Isistimu yethu inikwa amandla yi-220V, ngakho-ke asikho isidingo sokukhathalela ukusetshenziswa kwamandla.

Isixazululo esihle: ukuklama kwamandla aphansi akukona nje okonga amandla, kodwa futhi ukunciphisa izindleko zamamojula wamandla nezinhlelo zokupholisa, nokunciphisa ukuphazamiseka kwemisebe ye-electromagnetic kanye nomsindo oshisayo ngenxa yokunciphisa okwamanje.Njengoba izinga lokushisa ledivayisi lincipha, impilo yedivayisi inwetshwa ngokufanayo (izinga lokushisa lokusebenza ledivayisi ye-semiconductor likhuphuka ngama-degree angu-10, futhi ukuphila kufinyezwa ngesigamu).Ukusetshenziswa kwamandla kufanele kucatshangelwe noma nini.

Iphutha elivamile 19: Ukusetshenziswa kwamandla kwalawa ma-chips amancane kuphansi kakhulu, ungakhathazeki ngakho.

Isixazululo esihle: Kunzima ukunquma ukusetshenziswa kwamandla kwe-chip yangaphakathi engaxakile kakhulu.Inqunywa ngokuyinhloko i-current on the pin.I-ABT16244 idla ngaphansi kuka-1 mA ngaphandle komthwalo, kodwa inkomba yayo yiphini ngalinye.Ingakwazi ukushayela umthwalo we-60 mA (njengokufanisa ukumelana kwamashumi ama-ohms), okungukuthi, ukusetshenziswa kwamandla okuphezulu komthwalo ogcwele kungafinyelela ku-60 * 16 = 960mA.Yiqiniso, amandla okunikezwa kwamandla kuphela amakhulu kakhulu, futhi ukushisa kuwela emthwalweni.

Iphutha elivamile 20: Ungabhekana kanjani nalawa machweba we-I/O angasetshenzisiwe we-CPU ne-FPGA?Ungayishiya ingenalutho bese ukhuluma ngayo kamuva.

Isixazululo esihle: Uma izimbobo ze-I/O ezingasetshenzisiwe zishiywa zintanta, zingaba amasignali okokufaka anyakazayo ngokuphindaphindiwe ngokuphazamiseka okuncane okuvela emhlabeni wangaphandle, futhi ukusetshenziswa kwamandla kwamadivayisi e-MOS kuncike ngokuyisisekelo enanini lokuphenduka kwesekethe yesango.Uma idonselwa phezulu, iphinikhodi ngayinye izophinde ibe ne-microampere current, ngakho-ke indlela engcono kakhulu ukuyibeka njengokuphumayo (impela, azikho ezinye izimpawu ezinokushayela ezingaxhunywa ngaphandle).

Iphutha Elivamile 21: Kuneminyango eminingi esele kule FPGA, ngakho-ke ungayisebenzisa.

Isixazululo esihle: Ukusetshenziswa kwamandla kwe-FGPA kulingana nenani lama-flip-flops asetshenzisiwe kanye nenani lama-flips, ngakho ukusetshenziswa kwamandla kohlobo olufanayo lwe-FPGA kumasekhethi ahlukene kanye nezikhathi ezihlukene kungase kuhluke izikhathi ezingu-100.Ukunciphisa inani lama-flip-flop wokuphenyisa ngesivinini esikhulu kuyindlela eyisisekelo yokunciphisa ukusetshenziswa kwamandla kwe-FPGA.

Iphutha elivamile 22: Inkumbulo inezimpawu eziningi zokulawula.Ibhodi lami lidinga kuphela ukusebenzisa amasiginali we-OE kanye ne-WE.Okukhethiwe kwe-chip kufanele kusekelwe phansi, ukuze idatha iphume ngokushesha okukhulu ngesikhathi sokusebenza kokufundwa.

Isixazululo esihle: Ukusetshenziswa kwamandla kwezinkumbulo eziningi lapho ukukhethwa kwe-chip kuvumelekile (kungakhathalekile ukuthi i-OE ne-WE) kuzoba mkhulu ngokuphindwe izikhathi ezingu-100 kunalapho ukukhethwa kwe-chip kungavumelekile.Ngakho-ke, i-CS kufanele isetshenziselwe ukulawula i-chip ngangokunokwenzeka, nezinye izidingo kufanele kuhlangatshezwane nazo.Kungenzeka ukunciphisa ububanzi be-chip khetha ishayela.

Iphutha elivamile 23: Ukunciphisa ukusetshenziswa kwamandla kuwumsebenzi wabasebenzi behadiwe, futhi akuhlangene nesofthiwe.

Isixazululo esihle: I-Hardware iyisiteji nje, kepha isoftware ingumenzi.Ukufinyelela cishe kwawo wonke ama-chip ebhasini kanye nokuphenduka kwawo wonke amasignali kucishe kulawulwa isofthiwe.Uma isofthiwe inganciphisa inani lokufinyelela kumemori yangaphandle (isebenzisa okuguquguqukayo kwerejista okwengeziwe, Ukusetshenziswa Kakhudlwana kwe-CACHE yangaphakathi, njll.), ukusabela okufika ngesikhathi ekuphazamiseni (iziphazamiso ngokuvamile zisebenza ngezinga eliphansi neziphikisayo zokudonsa), nokunye. izinyathelo ezithile zamabhodi athile zizoba nomthelela omkhulu ekunciphiseni ukusetshenziswa kwamandla.Ukuze ibhodi liguquke kahle, ihadiwe kanye nesoftware kumele kubanjwe ngazo zombili izandla!

Iphutha elivamile 24: Kungani lezi zimpawu zidlula ngokweqile?Uma nje umdlalo umuhle, ungaqedwa.

Isixazululo esihle: Ngaphandle kwamasiginali athile athile (afana ne-100BASE-T, CML), kukhona ukudubuleka ngokweqile.Uma nje ingenkulu kakhulu, ayidingi ngempela ukumataniswa.Noma ngabe ifaniswe, ayifani neze kahle kakhulu.Isibonelo, i-impedance yokukhiphayo ye-TTL ingaphansi kwama-ohms angu-50, kanti abanye ngisho nama-ohms angu-20.Uma kusetshenziswa ukumelana okunjalo okukhulu okufanayo, okwamanje kuzoba kukhulu kakhulu, ukusetshenziswa kwamandla ngeke kwamukeleke, futhi i-amplitude yesignali izoba mncane kakhulu ukuthi isetshenziswe.Ngaphandle kwalokho, i-impedance yokukhiphayo yesiginali evamile lapho ukhipha izinga eliphezulu futhi ukhipha izinga eliphansi akufani, futhi kungenzeka futhi ukuzuza ukufanisa okuphelele.Ngakho-ke, ukufaniswa kwe-TTL, LVDS, 422 nezinye izimpawu kungamukeleka inqobo nje uma kufinyelelwa i-overshoot.